28 
Wing 290 ; rather more barred below than 
G. c. c erulescens. 
56b. Geranospizias ca@rulescens niger (Du Bus), Central America 
Bull. Ac. Roy. Brux., xiv., p. 103 (1847). from S. Mexico 
[Mexico, type in B. M.] to Panama. 
Black Hawk. 
Wing 6 290 mm., 2310 mm like Gc. 
c erulescens, except that general plumage 
is slaty black. 
57. Geranospizias gracilis (Temm.), Pl. Col.,i., Brazil, E. 
pl. 91 (1821). [£. Brazil, type in Leyden Bolivia, Para- 
Mus. | guay, N. Argen- 
Wood Hawk. tina. 
Larger; wing ad. 325-340 mm.; less 
bluish ; the entire under parts barred with 
whitish, some bars also appearing on the 
wings. 
Gen. XXII. UROTRIORCHIS Sharpe (1874). 
Type Astur macrourus Hartl. 
Tail longer than wing, very strongly graduated ; 
size large (length 24 in’). 
58. Urotriorchis macrourus macrourus (Hartl.), W. Africa 
J.£.0., 1855, p. 353. [ex. Temm. MS.—Gold (Gold Coast). 
Coast, type in Leyden Mus. ] 
W. African Grey Hawk. 
Wing 3 308, tail 328 mm. ; wing 2 315, tail 
354 mm. ; above blue grey, lighter on head 
and nape; upper tail-coverts white; tail 
very long, black above, greyish below, 
irregularly banded and tipped with white ; 
below chestnut. 
